CVE-2026-31829: Flowise affected by Server-Side Request Forgery (SSRF) in HTTP Node Leading to Internal Network Access

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-10 · updated 2026-06-17
Weakness: CWE-918

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.0.13, Flowise exposes an HTTP Node in AgentFlow and Chatflow that performs server-side HTTP requests using user-controlled URLs. By default, there are no restrictions on target hosts, including private/internal IP ranges (RFC 1918), localhost, or cloud metadata endpoints. This enables Server-Side Request Forgery (SSRF), allowing any user interacting with a publicly exposed chatflow to force the Flowise server to make requests to internal network resources that are inaccessible from the public internet. This vulnerability is fixed in 3.0.13.

Affected products

FlowiseAI Flowise: before 3.0.13 — fixed in 3.0.13

How to fix

Upgrade to a fixed version: FlowiseAI Flowise 3.0.13. Check the vendor advisory for mitigations.

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-fvcw-9w9r-pxc7

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